Oops, it doesn't look like 'hyunjin day' is a national day..

Other days

pampering

Pampering Day
boy friend

Boy Friend Day
martini

Martini Day
aloxolt

Aloxolt Day
get funky

Get Funky Day
bounce

Bounce Day
artists

Artists Day
comfy

Comfy Day
donate your hair

Donate Your Hair Day
cuddle up

Cuddle Up Day